static void __init setup_initrd()

in mm/init.c [46:81]

• 26 lines of code
• 4 McCabe index (conditional complexity)

static void __init setup_initrd(void)
{
	unsigned long size;

	if (initrd_start >= initrd_end) {
		pr_err("initrd not found or empty");
		goto disable;
	}

	if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
		pr_err("initrd extends beyond end of memory");
		goto disable;
	}

	size = initrd_end - initrd_start;

	if (memblock_is_region_reserved(__pa(initrd_start), size)) {
		pr_err("INITRD: 0x%08lx+0x%08lx overlaps in-use memory region",
		       __pa(initrd_start), size);
		goto disable;
	}

	memblock_reserve(__pa(initrd_start), size);

	pr_info("Initial ramdisk at: 0x%p (%lu bytes)\n",
		(void *)(initrd_start), size);

	initrd_below_start_ok = 1;

	return;

disable:
	initrd_start = initrd_end = 0;

	pr_err(" - disabling initrd\n");
}